Sometimes users run private S3-compatible storage with self-issued TLS certificate.

In that case Operators should be able to store backups there by either skipping TLS verification or by accepting self-issued CAs.

pgbackrest (used in PG Operator) has this functionality:

and there is a corresponding flag in PG Operator:

We need to add the same functionality to MySQL and MongoDB Operators.

This improvement adds the new flag into storages configuration in MySQL/PXC Operator.